6piston brake on 135i only?

Redline · 01-13-2008, 12:43 AM

Does not the M5 , M6, or even M3 have 6 piston?

grant · 01-13-2008, 01:38 AM

No, the 135i is the only one. May be the start of a new trend (hopefully).

Advevo · 01-13-2008, 04:25 PM

6 pots brakes are just fantasic. Put in a set of race pads and you can race with them.

Brandon26pdx · 01-13-2008, 04:30 PM

They're made by Brembo, so possibly this is the first example of collaboration between the two companies. Ive heard they will make the Brembo 6-piston kit available for the 3-series guys too.

josh · 01-13-2008, 04:34 PM

Could someone explain to us newbies what is the advantage of 6-piston calipers over lesser ones? Is it more fade resistance, better 'feel', better heat dissipation, or somesuch?

It seems most disk calipers can clamp on hard enough to lock the wheel, so it can't be 'pure stopping power'.

Ryephile · 01-13-2008, 04:53 PM

The big advantage is the caliper is fixed to the knuckle, not floating like all over Bimmer brake calipers. This offers a fantastic firm pedal with excellent feel; superior feel to a floating caliper. They're also lighter!

grant · 01-13-2008, 05:07 PM

Quote:

Originally Posted by Advevo

6 pots brakes are just fantasic. Put in a set of race pads and you can race with them.

I'm still not convinced that there is enough rotor for hard track use (but I love 6-piston calipers).

Ryephile · 01-13-2008, 05:22 PM

The rotor is 338x26mm, which is probably fine for HPDE's where you're doing 20 minute sessions. It will probably be a while before someone releases a decent brake pad that will last that long though!

aus · 01-13-2008, 05:23 PM

Quote:

Originally Posted by josh

Could someone explain to us newbies what is the advantage of 6-piston calipers over lesser ones? Is it more fade resistance, better 'feel', better heat dissipation, or somesuch?

It seems most disk calipers can clamp on hard enough to lock the wheel, so it can't be 'pure stopping power'.

Most BMW's up till now had a single piston floating caliper. When you step on the brakes, the piston presses against the rotor and the other side is essentiall pulled towards the rotor. With the fixed caliper, there are pistons on both sides, so the caliper doesn't slide.

As for any real advantage of 2 pistons vs. 8 piston's, it doesn't really matter. It really depends on the piston surface area. The main advantage of a big brake kit, is better heat handling and dissipation.

Advevo · 01-14-2008, 06:04 PM

i race with a bmw 130i cup we use 4 piston brembo calipers on original 330mm discs with carbon metallic 01 compound pads no problem discs last 4 race weekends.

135i discs are even bigger. Just use good race pads on track.

SA135i · 01-15-2008, 03:32 AM

Hey Advevo, I see you still list yourself as driving a 130i. When are you getting into your 135i?

Advevo · 01-15-2008, 04:26 AM

I still have my 130i 3 doors next to my 135i the wifey drives de 130i. Tommorow my registration for the 135i will be there. So one more day and then drive.

SA135i · 01-15-2008, 04:36 AM

Quote:

Originally Posted by Advevo

I still have my 130i 3 doors next to my 135i the wifey drives de 130i. Tommorow my registration for the 135i will be there. So one more day and then drive.

You must be so excited

.

I really don't know how you held out for so long, knowing that the car was there, seeing it, sitting in it but not driving it. I know I would not have been able to hold out for 3 weeks as you have, but then again you did get to go on an extended test drive. Me, I have to rely on feedback over the net and look at pictures as there are no 1er coupes here to even look at nevermind drive.

PrematureApex · 01-15-2008, 06:42 AM

Quote:

Originally Posted by Advevo

6 pots brakes are just fantasic. Put in a set of race pads and you can race with them.

Not really. Did you see the width of the rotors? Not as much capacity as one would first think...

I think its going to take a serious pad on there to withstand hard lapping. Even then, rotor or pad life won't be the same a with a BBK of that diameter, but with a wider rotor.

Not complaining, but these aren't quite the brakes they appear to be at first glance.

ShifterKart · 01-15-2008, 11:08 AM

As been stated the real advantage is in having fixed calipers and not floating calipers. This can be achieved without 6 pistons and has been done for a long time with 4. Besides for the "cool" factor, the only advantage to 6 pots is more even distribution of the brake force to the pad leading to more even pad wear.

If the brakes can lock up the tries they are adequate for the vehicle. As long as they remain fade free.

ZAMIRZ · 01-15-2008, 02:51 PM

Another advantage of ditching the floating caliper is no more uneven pad wear! Hooray. I'm so sick and tired of replacing the front brake pads on my MINI. Outer pad is at 70% or more, while the inner pad is closer to 30.

SlickShift · 01-15-2008, 03:04 PM

Apparently BMW is only putting the 6-piston calipers on the 135i because of fitting issues with the single caliper floating system.

PrematureApex · 01-15-2008, 03:31 PM

Quote:

Originally Posted by ZAMIRZ

Another advantage of ditching the floating caliper is no more uneven pad wear! Hooray. I'm so sick and tired of replacing the front brake pads on my MINI. Outer pad is at 70% or more, while the inner pad is closer to 30.

Why aren't you pulling off the useless tab and swapping sides? You should be able to get a full life cycle out of them doing this.

ZAMIRZ · 01-15-2008, 03:41 PM

Quote:

Originally Posted by PrematureApex

Why aren't you pulling off the useless tab and swapping sides? You should be able to get a full life cycle out of them doing this.

It's so cheap to just buy new pads rather than swapping tabs and putting them back in place, that I just switch them out to all new stuff. It's not the money, it's just the wastefulness and the hassle of changing them out.

AwesomeBMW · 01-15-2008, 04:10 PM

Quote:

Originally Posted by SlickShift

Apparently BMW is only putting the 6-piston calipers on the 135i because of fitting issues with the single caliper floating system.

oh well. Their engineering problem is our gain

aus · 01-16-2008, 12:26 AM

What fitting issues?

And BMW has signed a deal with Brembo for future brakes, so we may be seeing more fixed caliper, multi-piston calipers in the future.

crzy4135i · 01-19-2008, 05:38 PM

Quote:

Originally Posted by aus

What fitting issues?

And BMW has signed a deal with Brembo for future brakes, so we may be seeing more fixed caliper, multi-piston calipers in the future.

They need to do something.. There are many other cars that have 6 piston brakes fitted from the factory.

01-13-2008, 12:43 AM	#1
Redline Private First Class 22 Rep 143 Posts Drives: Join Date: Oct 2007 iTrader: (0)	6piston brake on 135i only? Does not the M5 , M6, or even M3 have 6 piston? __________________ AlpineWhite (deciding) Black Leatherette (for sure) Glaciersilver or Highglossblack trim Sport Package Active Steering Manual Transmission :roundel:
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01-13-2008, 01:38 AM	#2
grant Lieutenant 17 Rep 524 Posts Drives: 1973 Porsche 911 Join Date: Jul 2007 Location: Denver, CO iTrader: (0)	No, the 135i is the only one. May be the start of a new trend (hopefully). __________________ 1973 Porsche Carrera RS 2.7 Carbon Fiber (240hp & 1,890 lbs)
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01-13-2008, 04:25 PM	#3
Advevo Banned 581 Rep 1,170 Posts Drives: M2 Competition, E30 M3 DTM Join Date: Apr 2006 Location: Country where the taxes are too high!! iTrader: (0)	6 pots brakes are just fantasic. Put in a set of race pads and you can race with them.
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01-13-2008, 04:30 PM	#4
Brandon26pdx Lieutenant Colonel 28 Rep 1,938 Posts Drives: 2011 135i Join Date: Oct 2007 Location: Portland, OR iTrader: (1)	They're made by Brembo, so possibly this is the first example of collaboration between the two companies. Ive heard they will make the Brembo 6-piston kit available for the 3-series guys too.
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01-13-2008, 04:34 PM	#5
josh Private First Class 12 Rep 127 Posts Drives: E36 M3, 135i Join Date: Oct 2007 iTrader: (0)	Could someone explain to us newbies what is the advantage of 6-piston calipers over lesser ones? Is it more fade resistance, better 'feel', better heat dissipation, or somesuch? It seems most disk calipers can clamp on hard enough to lock the wheel, so it can't be 'pure stopping power'.
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01-13-2008, 04:53 PM	#6
Ryephile Not a Newbie 1 Rep 173 Posts Drives: Join Date: Nov 2007 iTrader: (0)	The big advantage is the caliper is fixed to the knuckle, not floating like all over Bimmer brake calipers. This offers a fantastic firm pedal with excellent feel; superior feel to a floating caliper. They're also lighter! __________________ [SIGPIC][/SIGPIC]
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01-13-2008, 05:22 PM	#8
Ryephile Not a Newbie 1 Rep 173 Posts Drives: Join Date: Nov 2007 iTrader: (0)	The rotor is 338x26mm, which is probably fine for HPDE's where you're doing 20 minute sessions. It will probably be a while before someone releases a decent brake pad that will last that long though! __________________ [SIGPIC][/SIGPIC]
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01-14-2008, 06:04 PM	#10
Advevo Banned 581 Rep 1,170 Posts Drives: M2 Competition, E30 M3 DTM Join Date: Apr 2006 Location: Country where the taxes are too high!! iTrader: (0)	i race with a bmw 130i cup we use 4 piston brembo calipers on original 330mm discs with carbon metallic 01 compound pads no problem discs last 4 race weekends. 135i discs are even bigger. Just use good race pads on track.
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01-15-2008, 03:32 AM	#11
SA135i First Lieutenant 14 Rep 333 Posts Drives: Join Date: Dec 2007 iTrader: (0)	Hey Advevo, I see you still list yourself as driving a 130i. When are you getting into your 135i? __________________ "But don't be surprised if you completely forget about your passengers when driving this car. You will be mesmerised by the feel of the fat, well-weighted steering wheel in your hands, the sound from the specially tuned exhaust, and the in-gear acceleration that will have you grinning like a loon...." TopCar magazine (SA)
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01-15-2008, 04:26 AM	#12
Advevo Banned 581 Rep 1,170 Posts Drives: M2 Competition, E30 M3 DTM Join Date: Apr 2006 Location: Country where the taxes are too high!! iTrader: (0)	I still have my 130i 3 doors next to my 135i the wifey drives de 130i. Tommorow my registration for the 135i will be there. So one more day and then drive.
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01-15-2008, 11:08 AM	#15
ShifterKart Private First Class 4 Rep 118 Posts Drives: 2011 MR/BB E92 M3 Join Date: Jul 2006 Location: Tucson, AZ iTrader: (0)	As been stated the real advantage is in having fixed calipers and not floating calipers. This can be achieved without 6 pistons and has been done for a long time with 4. Besides for the "cool" factor, the only advantage to 6 pots is more even distribution of the brake force to the pad leading to more even pad wear. If the brakes can lock up the tries they are adequate for the vehicle. As long as they remain fade free.
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01-15-2008, 02:51 PM	#16
ZAMIRZ New Member 0 Rep 29 Posts Drives: Join Date: Oct 2007 iTrader: (0)	Another advantage of ditching the floating caliper is no more uneven pad wear! Hooray. I'm so sick and tired of replacing the front brake pads on my MINI. Outer pad is at 70% or more, while the inner pad is closer to 30.
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01-15-2008, 03:04 PM	#17
SlickShift Lieutenant Colonel 323 Rep 1,804 Posts Drives: '11 BMW E90 M3 ZCP, '21 X5 ZMP Join Date: May 2007 Location: Atlanta iTrader: (7)	Apparently BMW is only putting the 6-piston calipers on the 135i because of fitting issues with the single caliper floating system. __________________ -Nick 2018 BMW 440i - M Sport, Exec Glacier Silver Metallic/Coral Red Dakota Retired: '00 323i, '06 325Ci, '09 135i, '06 Z4M Roadster, '93 525i, '76 2002, '14 X1, '14 M235i, '16 X4, '16 435i
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01-16-2008, 12:26 AM	#21
aus Major General 890 Rep 9,031 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	What fitting issues? And BMW has signed a deal with Brembo for future brakes, so we may be seeing more fixed caliper, multi-piston calipers in the future.
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